On Thu, 5 Feb 2026 15:23:31 GMT, Alan Bateman <[email protected]> wrote:

>> The I/O Poller used to support virtual threads doing blocking networking I/O 
>> has been significantly refactored in the loom repo. There are several 
>> improvements that should be brought to main line:
>> 
>> 1. New poller mode that uses a read poller per carrier, this is beneficial 
>> in some workloads.
>> 2. Better cleanup/recovery in the event if a file descriptor or memory can't 
>> be allocated during initializatio.
>> 3. NativeThread changed to cache native thread ID and avoid JNI call to 
>> current0 for each blocking I/O op.
>> 
>> The changes have been in the loom repo for a long time, this is why the 
>> copyright header is updated to 2025 (not 2026) in some cases.
>> 
>> Testing: tier1 + tier2.
>
> Alan Bateman has updated the pull request with a new target base due to a 
> merge or a rebase. The incremental webrev excludes the unrelated changes 
> brought in by the merge/rebase. The pull request contains 16 additional 
> commits since the last revision:
> 
>  - Avoid needless dup2 when there are no platform threads blocked on fd
>  - Merge branch 'master' into JDK-8374170
>  - Merge branch 'master' into JDK-8374170
>  - pollset -> setid
>  - Pull update PollsetPoller update from loom repo
>  - Merge branch 'master' into JDK-8374170
>  - Merge branch 'master' into JDK-8374170
>  - Merge branch 'master' into JDK-8374170
>  - Merge branch 'master' into JDK-8374170
>  - Merge branch 'master' into JDK-8374170
>  - ... and 6 more: https://git.openjdk.org/jdk/compare/98f093a9...76e7d498

Marked as reviewed by michaelm (Reviewer).

-------------

PR Review: https://git.openjdk.org/jdk/pull/29195#pullrequestreview-3761703579

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